Color tagging could be quite useful, but two issues make it not so useful at the moment for me:

1) having to click through menu-appearance-color is too much for me to bother, for something which needs to be a very quick tool - needs some kind of quick key before I would use it much

2) not being able to save my own colors - the defaults are much too bright for me - and I see that I can change them but being able to save my own set of six colors, or whatever, would make magicnotes feel much more useful to me - takes too much time to change the colors for quick notes

These are "small" things compared to the basic functionality; but they are the kinds of small things for which I would purchase and use the product.